Medium-Induced Gluon Radiation off Massive Quarks Fills the Dead Cone

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dc.creatorArmesto, Nestor
dc.creatorSalgado, Carlos A.
dc.creatorWiedemann, Urs Achim
dc.date2003-12-08
dc.date.accessioned2026-07-07T11:09:28Z
dc.date.available2026-07-07T11:09:28Z
dc.descriptionWe calculate the transverse momentum dependence of the medium-induced gluon energy distribution radiated off massive quarks in spatially extended QCD matter. In the absence of a medium, the distribution shows a characteristic mass-dependent depletion of the gluon radiation for angles smaller than m/E, the so-called dead cone effect. Medium-modifications of this spectrum are calculated as a function of quark mass, initial quark energy, in-medium pathlength and density. Generically, medium-induced gluon radiation is found to fill the dead cone, but it is reduced at large gluon energies compared to the radiation off light quarks. We quantify the resulting mass-dependence for momentum-averaged quantities (gluon energy distribution and average parton energy loss), compare it to simple approximation schemes and discuss its observable consequences for nucleus-nucleus collisions at RHIC and LHC. In particular, our analysis does not favor the complete disappearance of energy loss effects from leading open charm spectra at RHIC.
dc.description27 pages LaTeX, 15 eps-figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0312106
dc.identifierhttp://arxiv.org/abs/hep-ph/0312106
dc.identifierPhys.Rev.D69:114003,2004
dc.identifierdoi:10.1103/PhysRevD.69.114003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190478
dc.subjectHigh Energy Physics - Phenomenology
dc.titleMedium-Induced Gluon Radiation off Massive Quarks Fills the Dead Cone
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